DPG Phi
Verhandlungen
Verhandlungen
DPG

Dresden 2014 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 42: Magnetic Materials III

MA 42.7: Talk

Thursday, April 3, 2014, 16:45–17:00, HSZ 04

Small damping parameters in Co2FeSi and Fe2CoSi films — •Christian Sterwerf1, Markus Meinert1, Jan-Michael Schmalhorst1, Behrouz Khodadadi2, Soumalya Paul2, Matthias Buchmeier2, Claudia Mewes2, Tim Mewes2, and Günter Reiss11Thin Films and Physics of Nanostructures, Department of Physics, Bielefeld University, 33501 Bielefeld, Germany — 2Department of Physics and Astronomy/MINT Center, University of Alabama, Tuscaloosa, Alabama 35487, USA

Co and Fe based Heusler compounds are promising candidates for spintronic devices as they offer high Curie temperatues and high spin polarizations.

In an earlier publication we presented sputtered Co2−xFe1+xSi (0 ≤ x ≤ 1) films with good crystalline ordering and high tunnel magnetoresistance (TMR) ratios in magnetic tunnel junctions (MTJs) with a Co2−xFe1+xSi electrode. [1]

Magnetization relaxation and the anisotropy of the films were determined by broadband ferromagnetic resonance (FMR) and magnetooptical Kerr effect (MOKE) measurements. With the help of a broadband FMR and the consideration of the extrinsic linewidth, very small damping parameters were found. The damping parameter for Co2FeSi is 0.002.

[1] Sterwerf, Christian, et al. "High TMR Ratio in Co2FeSi and Fe2CoSi based Magnetic Tunnel Junctions." IEEE Transactions on Magnetics 49.7 (2013): 4386.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2014 > Dresden